What Is Gravity Made Of According to Quantum Physics?

Hey guys! We’re now live on Spotify🎧 Listen here: https://open.spotify.com/show/5rqQFYd... Three of the four forces of nature have a simple answer to what they are made of — a particle produced, counted, and put in a table. Gravity has an answer too. It has a name, a spin, a mass measured to twenty-three decimal places, and nobody has ever seen one. So what is holding you in your chair? Tonight we work slowly down through that answer, from Einstein's claim that gravity is not a force to a detector that would collapse into a black hole before it ever saw anything. Get cozy and let this slow walk through the quantum side of gravity keep you company tonight. Subscribe to Sundown Science if you enjoy the long way around the universe. CHAPTERS 0:00 Introduction 1:32 The Three Answers And The Missing One 9:16 The Force That Isn't A Force 19:04 Everything In Nature Comes In Pieces 27:54 How To Describe A Particle Nobody Has Seen 39:26 One Followed By Thirty-Six Zeros 47:38 The Quantum Theory Of Gravity We Already Have 58:33 Where We Stand Halfway Down 1:04:27 The Point Where The Answer Expires 1:15:14 The Detector That Collapses Into A Black Hole 1:25:06 The Crystal That Jumps One Step 1:34:04 Four Rival Answers To The Same Question 1:47:24 Two Diamonds In The Dark 1:59:58 What Gravity Is Made Of SOURCES Does Einstein's theory of gravity hold up to the latest LIGO/Virgo/KAGRA observations? — http://ligo.org/science-summaries/O3b... Rothman & Boughn, Can Gravitons Be Detected? — https://arxiv.org/pdf/gr-qc/0601043 Tobar et al., Detecting single gravitons with quantum sensing (Nature Communications) — https://www.nature.com/articles/s4146... Detecting single gravitons with quantum sensing (arXiv preprint) — https://arxiv.org/abs/2308.15440 Graviton detection and the quantization of gravity (Physical Review D) — https://link.aps.org/doi/10.1103/Phys... Effective Field Theory of Gravity: Leading Quantum Gravitational Corrections — https://arxiv.org/pdf/0708.1701 Universal leading quantum correction to the Newton potential (Eur. Phys. J. C) — https://link.springer.com/article/10.... Donoghue, The Quantum Theory of Gravitation, Effective Field Theories, and Strings — https://arxiv.org/pdf/2403.14008 Tests of General Relativity with GW170817 — https://arxiv.org/pdf/1811.00364 Strong Constraints on Cosmological Gravity from GW170817 and GRB 170817A — https://physics.aps.org/featured-arti... Rovelli, Covariant Loop Quantum Gravity — https://www.cpt.univ-mrs.fr/~rovelli/... NIST CODATA Value: Planck length — https://physics.nist.gov/cgi-bin/cuu/... NASA, What are Superstrings? — https://imagine.gsfc.nasa.gov/science... Absence of gravitationally induced entanglement in certain semi-classical theories of gravity — https://arxiv.org/pdf/2510.20991 Optimal Form Factors for Experimental Proposals on Gravity-Induced Entanglement — https://arxiv.org/pdf/2411.12631 — Disclaimer: All videos are produced for entertainment and education. Factual claims are sourced from peer-reviewed research and official scientific institutions. Where a video explores speculation, fringe theories, or the creator's own analysis, it is clearly labeled as such. Sundown Science is not a news outlet. Watch at your own discretion. #Graviton #QuantumGravity